I never thought I'd get my fill of non-fiction books about mathematicians. And this is not really a bad one. Maybe it was the silly title and the author's transition from that religious question to the more chicken-and-egg question: Do humans invent mathematics or do they discover mathematical principles?

Guess my question is, "Why do I care?"

Anyway, I found Livio's discussion of the achievements and ideas of the Greeks, including Pythagoras, very interesting.